Bull. U. S. B. F., 1909. 
Plate XXXVI. 
Fig. i. 
Fig. 2. 
Fig. 3. 
Fig. 5. 
Comb 
Fig. 1. — Left first maxilla of adult, from inner side. 
Fig. 2. — Left second maxilla. Ex, Ep, exopodital and epipodital divisions of respiratory fan or scaphognathite. 
1, 2, partially divided plates of protopodite modified for mastication. 
Fig. 3. — First maxilliped. fd, fold of epipodite, which forms trough in which inner blade of fan (fig. 2, Ep) works. 
Fig. 4. — Left second maxilliped, showing fused third joint (*) and rudimentary podobranch. 
Fig. 5. — Left third maxilliped, illustrating type of primitive two-branched limb, with functional podobranch, 
but fused third joint (r), and Comb and cleaning brushes of third and following segments. 
Figs. 5, a and 5, b. — Transverse sectional views of three-sided meros and ischium, to show comb and brush, in 
planes indicated. In preceding and following plates, End represents the permanent inner branch of the limb; 
Ex, the outer branch or exopodite; pro, the protopodite; ep, the epipodite; and pbr. the podobranch. See 
legend of figure 7, plate xxxv. 
